25 results on '"Ag NWs"'
Search Results
2. Rapid Preparation of Novel Ionic Polymer–Metal Composite for Improving Humidity Sensing Effect.
- Author
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Zhao, Chun, Ji, Yujun, Tang, Gangqiang, Zhao, Xin, Mei, Dong, Ru, Jie, Zhu, Denglin, and Wang, Yanjie
- Subjects
- *
HUMIDITY , *ARTIFICIAL skin , *SURFACE resistance , *DRYING agents , *NANOWIRES , *NAFION , *SENSES - Abstract
Ionic polymer–metal composites (IPMCs) have attracted attention in recent years due to their integration of actuation and sensing functions. As one of the main sensing functions of IPMCs, humidity sensing has been of consistent interest in wearable health monitors and artificial skin. However, there are still some technical challenges in that classical IPMCs have poor humidity sensing performance due to their dense surface electrode, and IPMCs are damaged easily due to an electrode/membrane mismatch. In this work, through the spraying and electrodepositing process, we developed an efficient method to rapidly prepare a Au-shell-Ag-NW (silver nanowire)-based IPMC with high strength, low surface resistance and excellent humidity sensing performance. Meanwhile, we optimized the preparation method by clarifying the influence of solvent type and electrodepositing time on the performance of the Au-shell-Ag-NW-based IPMC, thus effectively improving the humidity sensing effect and strength of the IPMC. Compared with previous research, the humidity electrical response (~9.6 mV) of the Au-shell-Ag-NW-based IPMC is at least two orders of magnitude higher than that of the classical IPMC (~0.41 mV), which is mainly attributed to the sparse gap structure for promoting the exchange of water molecules in the environment and Nafion membrane, a low surface resistance (~3.4 Ohm/sq) for transmitting the signal, and a seamless connection between the electrode and Nafion membrane for fully collecting the ion charges in the Nafion membrane. Additionally, the Au-shell-Ag-NW-based IPMC could effectively monitor the human breathing process, and the humidity sensing performance did not change after being exposed to the air for 4 weeks, which further indicates that the Au-shell-Ag-NW-based IPMC has good application potential due to its efficient preparation technology, high stability and good reproducibility. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
3. Scalable manufacturing of leaf‐like MXene/Ag NWs/cellulose composite paper electrode for all‐solid‐state supercapacitor
- Author
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Hao Tang, Ruwei Chen, Quanbo Huang, Wenjiao Ge, Xiaoqian Zhang, Yang Yang, and Xiaohui Wang
- Subjects
Ag NWs ,cellulose filaments ,fast ion channels ,hierarchical structure ,MXene ,supercapacitors ,Renewable energy sources ,TJ807-830 ,Environmental sciences ,GE1-350 - Abstract
Abstract Freestanding films with high strength and conductivity are critical for flexible electronics, such as supercapacitors. Herein, inspired from the natural leaf, a freestanding paper is constructed through fast vacuum filtration by “mesophylls‐like” MXene (Ti3C2TX) nanosheets and “vein‐like” cellulose filaments and silver nanowires (Ag NWs). The produced nanocomposite paper with 25 wt% Ti3C2TX and 8 wt% Ag NWs (PMxAg25‐8) exhibits high conductivity (58 843 S m−1) and excellent mechanical properties (Tensile strength of 34 MPa and Young's modulus of 6 GPa), which arises from the synergistic effects of the interactions between cellulose and MXene and the three‐dimensional interpenetrating frameworks. This interpenetrating framework can further benefit the electrochemical performance of the nanocomposite papers and the foldable paper electrode presents a high capacitance of 505 F g−1 with only 25 wt% MXene. This work paves the way for the fast fabrication of strong and multifunctional MXene macro‐assembly for flexible electronics by conventional papermaking process.
- Published
- 2022
- Full Text
- View/download PDF
4. Room-Temperature ppb-Level H 2 S Gas Sensors Based on Ag Nanowire/Hollow PPy Nanotube Nanocomposites.
- Author
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Su, Pi-Guey and Chai, Xing-Chen
- Subjects
NANOWIRES ,GAS detectors ,SILVER sulfide ,NANOCOMPOSITE materials ,TRANSMISSION electron microscopy ,SCANNING electron microscopy ,INFRARED spectroscopy - Abstract
H
2 S gas sensors were fabricated using Ag nanowire/hollow polypyrrole nanotube nanocomposite (Ag NW/hollow PPy NT) film for sensing ppb-level H2 S gas at room temperature. The morphology, phase composition and crystalline structure of Ag NW/hollow PPy NT nanocomposites were analyzed via scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometry (XRD) and Fourier-transform infrared spectroscopy (FTIR). TEM and SEM images revealed that Ag NWs were well dispersed in the hollow PPy NT matrix. IR results showed no interaction between Ag NWs and hollow PPy NTs in the Ag NW/hollow PPy NT nanocomposites. The effect of the amount of added Ag NWs on the response of the Ag NW/hollow PPy NT nanocomposites to the ppb-level H2 S gas was investigated. Comparative gas-sensing results revealed that the introduction of Ag NWs onto hollow PPy NTs was effective in promoting the sensor response to H2 S gas. More importantly, the Ag NW/hollow PPy NT nanocomposite had a strong response to ppb-level H2 S gas at room temperature. [ABSTRACT FROM AUTHOR]- Published
- 2022
- Full Text
- View/download PDF
5. Facile fabrication of Au-Ag alloy nanoparticles/Ag nanowires SERS substrates with bimetallic synergistic effect for ultra-sensitive detection of crystal violet and alkali blue 6B.
- Author
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Xu D, Zhou L, Zhang S, Wang Z, Yang W, Guo Q, Wang Z, and Chen J
- Abstract
The bimetallic nanostructure of Au and Ag can integrate two distinct properties into a novel substrate compared to single metal nanostructures. This work presents a rapid and sensitive surface-enhanced Raman scattering (SERS) substrate for detecting illegal food additives and dyes of crystal violet (CV) and alkali blue 6B (AB 6B). Au-Ag alloy nanoparticles/Ag nanowires (Au-Ag ANPs/Ag NWs) were prepared by solid-state ionics method and vacuum thermal evaporation method at 5μA direct current electric field (DCEF), the molar ratio of Au to Ag was 1:18.34. Many 40 nm-140 nm nanoparticles regularly existed on the surface of Ag NWs with the diameters from 80 nm to 150 nm. The fractal dimension of Au-Ag ANPs/Ag NWs is 1.69 due to macroscopic dendritic structures. Compared with single Ag NWs, the prepared Au-Ag ANPs/Ag NWs substrates show superior SERS performance because of higher surface roughness, the SERS active of Ag NWs and bimetallic synergistic effect caused by Au-Ag ANPs, so the limit of detections (LOD) of Au-Ag ANPs/Ag NWs SERS substrates toward detection of CV and AB 6B were as low as 10
-16 mol/L and 10-9 mol/L, respectively. These results indicate that Au-Ag ANPs/Ag NWs substrates can be used for rapid and sensitive detection of CV and AB 6B and have great development potential for detection of illegal food additives and hazardous substances in the fields of environmental monitoring and food safety., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
6. Silver nanowire/PEDOT:PSS hybrid electrode for flexible organic light-emitting diodes
- Author
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Hyun Gi Kim, Mansu Kim, Sung Soo Kim, Sang Hyun Paek, and Young Chul Kim
- Subjects
Ag NWs ,PEDOT:PSS ,Work function ,Flexible electrode ,OLEDs ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
We prepared a hybrid electrode comprosed of a silver nanowires/poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate) (AgNW/PEDOT:PSS) nanocomposite for flexible organic light-emitting diodes (FOLEDs). To increase the conductivity of PEDOT:PSS, diethylene glycol (DEG) was introduced into the PEDOT:PSS solution. The PEDOT:PSS layer shows a higher figure of merits (FoM) when prepared with the optimum amount of 7 vol%-DEG in the coating solution, due to the three-dimensional conducting network formed in the hybrid electrode. The perfluorinated ionomer (PFI) was also introduced into the PEDOT:PSS solution, and the resulting polymer solution was used to prepare a transparent anode on polymeric substrates. The PEDOT:PSS layers with higher contents of PFI exhibited higher work functions of 5.9 eV, due to control of the surface composition. After bending for 600,000 cycles, the hybrid electrode maintained a low R/R0 value. When the hybrid electrode with PFI-PEDOT:PSS was used as a transparent anode in a flexible OLED device, the FOLED exhibited a 25% higher current efficiency. Therefore, the enhanced performance of the FOLED devices fabricated on PFI-PEDOT:PSS anodes could be applicable to flexible displays.
- Published
- 2021
- Full Text
- View/download PDF
7. Construction of Petal-Like Ag NWs@NiCoP with Three-Dimensional Core-Shell Structure for Overall Water Splitting.
- Author
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Wang, Fan, Tian, Rui, Guo, Xingzhong, Hou, Yang, Zou, Chang, and Yang, Hui
- Abstract
High-efficiency, good electrical conductivity and excellent performance electrocatalysts are attracting growing attention in the field of overall water splitting. In order to achieve the desirable qualities, rational construction of the structure and chemical composition of electrocatalysts is of fundamental importance. Herein, petal-like structure Ni0.33Co0.67P shells grown on conductive silver nanowires (Ag NWs) cores as bifunctional electrocatalysts for overall water splitting were synthesized through a facile hydrothermal method and phosphorization. The resultant three-dimensional core-shell petal-like structure Ag NWs@Ni0.33Co0.67P possesses excellent catalytic activities in alkaline conditions with the overpotential of 259 mV for the oxygen evolution reaction (OER), 121 mV for the hydrogen evolution reaction (HER) and a full cell voltage of 1.64 V to reach the current density of 10 mA cm−2. Highly conductive Ag NWs as cores and high surface area petal-like Ni0.33Co0.67P as shells can endow outstanding catalytic performance for the bifunctional electrocatalyst. Thus, the synthetic strategy of the three-dimensional core-shell structure Ag NWs@Ni0.33Co0.67P considerably advances the practice of Ag NWs toward electrocatalysts. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
8. Ultra-stable Ag NWs transparent conductive film protected by AgCl and PbO2 passivation layer.
- Author
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Luo, Huihua, Zhu, Haifeng, Di Ayingmo, A., Zhang, Yaping, and Yu, Lianqing
- Subjects
- *
NANOWIRES , *HEAT treatment , *SURFACE passivation , *CHEMICAL stability , *MONOMOLECULAR films - Abstract
The reported Pb2+/Ag NWs and Fe3+/Ag NWs transparent conductive films exhibited remarkable high-temperature oxidation resistance, stable optoelectronic properties, acid and alkali resistance. [Display omitted] • Fe3+/Ag NWs transparent conductive films are fabricated by impregnation method. • Pb2+/Ag NWs transparent conductive film was prepared by liquid phase method. • The as-obtained transparent conductive films exhibited remarkable environmental stability. AgCl and PbO 2 protective passivation layer on the surface of Ag nanowires (Ag NWs) were successfully fabricated by two facile methods. The as-obtained Pb2+/Ag NWs and Fe3+/Ag NWs transparent conductive films exhibited remarkable high-temperature oxidation resistance, stable optoelectronic properties, acid and alkali resistance. The sheet resistance of the Pb2+/Ag NWs and Fe3+/Ag NWs transparent conductive film could be detected even after etched by 1 M HCl and NaOH for 4 h. Furthermore, the constructing protective passivation monolayer acts as a shelter protecting the Ag nanowires from chemical and structural damage. The network structure of Pb2+/Ag NWs and Fe3+/Ag NWs transparent conductive film contact each other after the heat treatment temperature exceeds 300 ℃. The transmittance changed from 86.9 % to 81.4 % and the sheet resistance of Pb2+/Ag NWs transparent conductive film shown a smaller change trend, which verified that the film has enhanced highly. environmental stability. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
9. Rapid Preparation of Novel Ionic Polymer–Metal Composite for Improving Humidity Sensing Effect
- Author
-
Chun Zhao, Yujun Ji, Gangqiang Tang, Xin Zhao, Dong Mei, Jie Ru, Denglin Zhu, and Yanjie Wang
- Subjects
IPMC ,electrode ,Ag NWs ,high strength ,humidity sensing ,Organic chemistry ,QD241-441 - Abstract
Ionic polymer–metal composites (IPMCs) have attracted attention in recent years due to their integration of actuation and sensing functions. As one of the main sensing functions of IPMCs, humidity sensing has been of consistent interest in wearable health monitors and artificial skin. However, there are still some technical challenges in that classical IPMCs have poor humidity sensing performance due to their dense surface electrode, and IPMCs are damaged easily due to an electrode/membrane mismatch. In this work, through the spraying and electrodepositing process, we developed an efficient method to rapidly prepare a Au-shell-Ag-NW (silver nanowire)-based IPMC with high strength, low surface resistance and excellent humidity sensing performance. Meanwhile, we optimized the preparation method by clarifying the influence of solvent type and electrodepositing time on the performance of the Au-shell-Ag-NW-based IPMC, thus effectively improving the humidity sensing effect and strength of the IPMC. Compared with previous research, the humidity electrical response (~9.6 mV) of the Au-shell-Ag-NW-based IPMC is at least two orders of magnitude higher than that of the classical IPMC (~0.41 mV), which is mainly attributed to the sparse gap structure for promoting the exchange of water molecules in the environment and Nafion membrane, a low surface resistance (~3.4 Ohm/sq) for transmitting the signal, and a seamless connection between the electrode and Nafion membrane for fully collecting the ion charges in the Nafion membrane. Additionally, the Au-shell-Ag-NW-based IPMC could effectively monitor the human breathing process, and the humidity sensing performance did not change after being exposed to the air for 4 weeks, which further indicates that the Au-shell-Ag-NW-based IPMC has good application potential due to its efficient preparation technology, high stability and good reproducibility.
- Published
- 2023
- Full Text
- View/download PDF
10. Room-Temperature ppb-Level H2S Gas Sensors Based on Ag Nanowire/Hollow PPy Nanotube Nanocomposites
- Author
-
Pi-Guey Su and Xing-Chen Chai
- Subjects
Ag NWs ,hollow PPy NTs ,nanocomposite ,H2S gas sensor ,room temperature ,Biochemistry ,QD415-436 - Abstract
H2S gas sensors were fabricated using Ag nanowire/hollow polypyrrole nanotube nanocomposite (Ag NW/hollow PPy NT) film for sensing ppb-level H2S gas at room temperature. The morphology, phase composition and crystalline structure of Ag NW/hollow PPy NT nanocomposites were analyzed via scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometry (XRD) and Fourier-transform infrared spectroscopy (FTIR). TEM and SEM images revealed that Ag NWs were well dispersed in the hollow PPy NT matrix. IR results showed no interaction between Ag NWs and hollow PPy NTs in the Ag NW/hollow PPy NT nanocomposites. The effect of the amount of added Ag NWs on the response of the Ag NW/hollow PPy NT nanocomposites to the ppb-level H2S gas was investigated. Comparative gas-sensing results revealed that the introduction of Ag NWs onto hollow PPy NTs was effective in promoting the sensor response to H2S gas. More importantly, the Ag NW/hollow PPy NT nanocomposite had a strong response to ppb-level H2S gas at room temperature.
- Published
- 2022
- Full Text
- View/download PDF
11. Construction of Petal-Like Ag NWs@NiCoP with Three-Dimensional Core-Shell Structure for Overall Water Splitting
- Author
-
Fan Wang, Rui Tian, Xingzhong Guo, Yang Hou, Chang Zou, and Hui Yang
- Subjects
overall water splitting ,core-shell structure ,Ag NWs ,transition metal phosphides ,bifunctional electrocatalysts ,Chemistry ,QD1-999 - Abstract
High-efficiency, good electrical conductivity and excellent performance electrocatalysts are attracting growing attention in the field of overall water splitting. In order to achieve the desirable qualities, rational construction of the structure and chemical composition of electrocatalysts is of fundamental importance. Herein, petal-like structure Ni0.33Co0.67P shells grown on conductive silver nanowires (Ag NWs) cores as bifunctional electrocatalysts for overall water splitting were synthesized through a facile hydrothermal method and phosphorization. The resultant three-dimensional core-shell petal-like structure Ag NWs@Ni0.33Co0.67P possesses excellent catalytic activities in alkaline conditions with the overpotential of 259 mV for the oxygen evolution reaction (OER), 121 mV for the hydrogen evolution reaction (HER) and a full cell voltage of 1.64 V to reach the current density of 10 mA cm−2. Highly conductive Ag NWs as cores and high surface area petal-like Ni0.33Co0.67P as shells can endow outstanding catalytic performance for the bifunctional electrocatalyst. Thus, the synthetic strategy of the three-dimensional core-shell structure Ag NWs@Ni0.33Co0.67P considerably advances the practice of Ag NWs toward electrocatalysts.
- Published
- 2022
- Full Text
- View/download PDF
12. Facile Synthesis of Silver Nanowires with Different Aspect Ratios and Used as High-Performance Flexible Transparent Electrodes
- Author
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Qingwen Xue, Weijing Yao, Jun Liu, Qingyong Tian, Li Liu, Mengxiao Li, Qiang Lu, Rui Peng, and Wei Wu
- Subjects
Ag NWs ,Tailorable aspect ratios ,Flexible transparent electrodes ,Low-temperature welding ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Abstract Silver nanowires (Ag NWs) are the promising materials to fabricate flexible transparent electrodes, aiming to replace indium tin oxide (ITO) in the next generation of flexible electronics. Herein, a feasible polyvinylpyrrolidone (PVP)-mediated polyol synthesis of Ag NWs with different aspect ratios is demonstrated and high-quality Ag NWs transparent electrodes (NTEs) are fabricated without high-temperature thermal sintering. When employing the mixture of PVP with different average molecular weight as the capping agent, the diameters of Ag NWs can be tailored and Ag NWs with different aspect ratios varying from ca. 30 to ca. 1000 are obtained. Using these as-synthesized Ag NWs, the uniform Ag NWs films are fabricated by repeated spin coating. When the aspect ratios exceed 500, the optoelectronic performance of Ag NWs films improve remarkably and match up to those of ITO films. Moreover, an optimal Ag NTEs with low sheet resistance of 11.4 Ω/sq and a high parallel transmittance of 91.6% at 550 nm are achieved when the aspect ratios reach almost 1000. In addition, the sheet resistance of Ag NWs films does not show great variation after 400 cycles of bending test, suggesting an excellent flexibility. The proposed approach to fabricate highly flexible and high-performance Ag NTEs would be useful to the development of flexible devices.
- Published
- 2017
- Full Text
- View/download PDF
13. Construction of alternating layered quasi-three-dimensional electrode Ag NWs/CoO for water splitting: A discussion of catalytic mechanism.
- Author
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Liu, Xuanwen, Wang, Renchao, He, Yan, Ni, Zhiyuan, Su, Na, Guo, Rui, Zhao, Yao, You, Junhua, and Yi, Tingfeng
- Subjects
- *
ELECTROCATALYSTS , *WATER electrolysis , *HYDROGEN evolution reactions , *OXYGEN evolution reactions , *ELECTRODES , *CATALYTIC activity - Abstract
It is increasingly important to synthesize a low-cost and high-efficiency bifunctional electrocatalyst for overall water splitting. Herein, a unique line-sphere layered superstructure Ag/CoO is prepared via a facile alternating electrodeposition method. Compared to electrocatalysts with CoO as the innermost layer, the Ag/CoO catalysts with Ag nanowires (NWs) as initial layer take more advantages of the low conductance for water splitting. Electrochemical tests reveal that the layered superstructure material with n+1 layers of Ag NWs and n layers of CoO (An+1Cn) exhibits excellent catalytic activities and stabilities for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In addition, when the catalyst consisting of 3 layers of Ag NWs and 2 layers of CoO (A3C2) used as a dual-function electrode, only a potential of 1.90 V is needed for current density of 10 mA cm−2. Based on the kinetics and thermodynamic measurements of the catalytic processes, a reasonable catalytic mechanism of overall water splitting has been proposed for different electrocatalysts. The results show that the diffusion of hydrogen-containing species may be the rate-determining step. Image 1 • Ag/CoO electrodes were successfully prepared by alternating electrodeposition method. • The mechanism is discussed in detail based on temperature-dependant experiments. • The electrolyzed water system of A3C2 exhibits a perfect catalytic activity. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
14. Silver nanowire/PEDOT:PSS hybrid electrode for flexible organic light-emitting diodes
- Author
-
Young Chul Kim, Mansu Kim, Sung Soo Kim, Hyun Gi Kim, and Sang Hyun Paek
- Subjects
Materials science ,Ag NWs ,Materials Science (miscellaneous) ,02 engineering and technology ,engineering.material ,010402 general chemistry ,01 natural sciences ,Work function ,Biomaterials ,Coating ,PEDOT:PSS ,OLED ,Materials of engineering and construction. Mechanics of materials ,Nanocomposite ,business.industry ,Flexible electrode ,OLEDs ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Anode ,Flexible display ,Electrode ,Ceramics and Composites ,engineering ,TA401-492 ,Optoelectronics ,0210 nano-technology ,business ,Layer (electronics) - Abstract
We prepared a hybrid electrode comprosed of a silver nanowires/poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate) (AgNW/PEDOT:PSS) nanocomposite for flexible organic light-emitting diodes (FOLEDs). To increase the conductivity of PEDOT:PSS, diethylene glycol (DEG) was introduced into the PEDOT:PSS solution. The PEDOT:PSS layer shows a higher figure of merits (FoM) when prepared with the optimum amount of 7 vol%-DEG in the coating solution, due to the three-dimensional conducting network formed in the hybrid electrode. The perfluorinated ionomer (PFI) was also introduced into the PEDOT:PSS solution, and the resulting polymer solution was used to prepare a transparent anode on polymeric substrates. The PEDOT:PSS layers with higher contents of PFI exhibited higher work functions of 5.9 eV, due to control of the surface composition. After bending for 600,000 cycles, the hybrid electrode maintained a low R/R0 value. When the hybrid electrode with PFI-PEDOT:PSS was used as a transparent anode in a flexible OLED device, the FOLED exhibited a 25% higher current efficiency. Therefore, the enhanced performance of the FOLED devices fabricated on PFI-PEDOT:PSS anodes could be applicable to flexible displays.
- Published
- 2021
15. Facile Synthesis of Silver Nanowires with Different Aspect Ratios and Used as High-Performance Flexible Transparent Electrodes.
- Author
-
Xue, Qingwen, Yao, Weijing, Liu, Jun, Tian, Qingyong, Liu, Li, Li, Mengxiao, Lu, Qiang, Peng, Rui, and Wu, Wei
- Subjects
NANOSTRUCTURED materials synthesis ,SILVER nanoparticles ,POVIDONE ,NANOWIRES ,FABRICATION (Manufacturing) ,ELECTRONICS ,POLYOL synthesis - Abstract
Silver nanowires (Ag NWs) are the promising materials to fabricate flexible transparent electrodes, aiming to replace indium tin oxide (ITO) in the next generation of flexible electronics. Herein, a feasible polyvinylpyrrolidone (PVP)-mediated polyol synthesis of Ag NWs with different aspect ratios is demonstrated and high-quality Ag NWs transparent electrodes (NTEs) are fabricated without high-temperature thermal sintering. When employing the mixture of PVP with different average molecular weight as the capping agent, the diameters of Ag NWs can be tailored and Ag NWs with different aspect ratios varying from ca. 30 to ca. 1000 are obtained. Using these as-synthesized Ag NWs, the uniform Ag NWs films are fabricated by repeated spin coating. When the aspect ratios exceed 500, the optoelectronic performance of Ag NWs films improve remarkably and match up to those of ITO films. Moreover, an optimal Ag NTEs with low sheet resistance of 11.4 Ω/sq and a high parallel transmittance of 91.6% at 550 nm are achieved when the aspect ratios reach almost 1000. In addition, the sheet resistance of Ag NWs films does not show great variation after 400 cycles of bending test, suggesting an excellent flexibility. The proposed approach to fabricate highly flexible and high-performance Ag NTEs would be useful to the development of flexible devices. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
16. Foldable and highly flexible transparent conductive electrode based on PDMS/ Ag NWs/PEDOT: PSS.
- Author
-
Zhou, Yan, Zhao, Le, Song, Zichen, Chang, Chunlei, Yang, Lin, and Yu, Shihui
- Subjects
- *
POLYMER electrodes , *SANDWICH construction (Materials) , *TRANSFER printing , *ELECTRODES , *QUALITY factor , *TECHNOLOGY transfer - Abstract
In this work, we can transfer poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT: PSS) from the glass substrate to the polydimethylsiloxane (PDMS) substrate by using HNO 3 treatment, without losing the resistance and transmittance of the transparent conductive film, which overcome the hydrophobic characteristic of the PDMS substrate. The silver nanowires (Ag NWs) based flexible transparent electrode with PDMS as substrate is prepared. The PDMS/Ag NWs/PEDOT: PSS composite film shows a high transmittance of over 84.07% and low sheet resistance of 9.05 Ω/sq, and its quality factor can reach 218.2. Moreover, the transparent conductive film has an excellent folding performance. After 200 repeated folding experiments, the resistance change rate is only 7.8%. The heater prepared by using the composite film can reach a maximum heating temperature of 184.4 °C, and repeat the on-off operation several times under the condition of 55 °C, which proves the promising application of transparent conductive film in wearable devices for human bodies. • We demonstrate a transparent conductive film with a sandwich structure, in which we use modified PEDOT: PSS assisted transfer printing technology to transfer silver nanowires to untreated PDMS substrate. Compared to previous methods, we can achieve a higher electrical performance: a low sheet resistance of 9.05 Ω/sq and high transmittance of 84.07%. • Due to the super soft nature of PDMS, the Ag NWs/PDMS composites have excellent folding performance, whose resistance changes only about 7.5% in the initial 200 folds. • The heater prepared based on the Ag NWs/PDMS composites has good electric heating performance. When the applied voltage is 2 V, The temperature of the heater can quickly reach about 55 °C and remains stable in 30 repeated switching experiments. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
17. 2D layered nickel-cobalt double hydroxide nano sheets @ 1D silver nanowire-graphitic carbon nitrides for high performance super capacitors.
- Author
-
Rajesh, D., Francis, Mathew K., Bhargav, P. Balaji, Nafis, A., and Balaji, C.
- Subjects
- *
NANOSTRUCTURED materials , *SUPERCAPACITOR electrodes , *SUPERCAPACITORS , *LAYERED double hydroxides , *NITRIDES , *NANOCOMPOSITE materials , *FIELD emission electron microscopy - Abstract
Designing nanostructured electrocatalysts plays an important role in improving the electro-catalytic behaviors of energy storage devices. Achieving the high specific capacitance of these devices depends on the structure of nanomaterials and their synthesis process. Herein, we report a novel system consisting of 2D layered materials and 1D nanowire with desirable properties suitable for supercapacitor applications. Nickel-Cobalt layered double hydroxide (Ni-Co LDH)@Silver nanowire (Ag NWs)/graphitic carbon nitride (g-C 3 N 4) nanomaterial was successfully synthesized using hydrothermal and ultra-sonication methods. The structural studies of the synthesized Ni-Co LDH based electrode materials are characterized by using different analytical techniques namely, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Field emission scanning electron microscopy (FE-SEM), High-resolution transmission electron microscopy (HR-TEM), Energy dispersive spectroscopy (EDAX). The electrochemical performance of Ni-Co LDH@Ag NWs/g-C 3 N 4 hybrid electrode is investigated using Galvanostatic charge-discharge (GCD), cyclic and voltammetry (CV) techniques. The designed 3D nanostructured composites (Ni-Co LDH@Ag NWs/g-C 3 N 4) showed high specific capacitance of 848.5 F/g at a current density at 1 A/g as good cyclic stability after 2000 cycles charge-discharge duration (93.5% at current density 5 A/g). Novel ASCs using Ni-CoLDH@AgNWs/g-C 3 N 4 electrode with high specific capacitance 848 F/g@ 1 A/g and cyclic stability 93.5% after 2000 cycles@ 5 A/g. [Display omitted] • 1D Ag NWs and 2D NiCo LDH are successively synthesized by hydrothermal methods. • The conductivity and active sites are increased by addition of Ag NWs and g-C 3 N 4 for electrode materials preparation. • The Ni-Co LDH@Ag NWs/g-C 3 N 4 shows high specific capacitance of 848.5 F/g at a current density at 1 A/g. • The assembled asymmetric supercapacitor exhibit high energy and power densities. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
18. Enhanced adhesion of Ag nanowire based transparent conducting electrodes for application in flexible electrochromic devices.
- Author
-
Yu, Shihui, Ma, Xinyue, Li, Xiaopeng, Li, Junjun, Gong, Baoming, and Wang, Xiaohu
- Subjects
- *
ELECTROCHROMIC devices , *NANOWIRES , *ELECTRODES , *INDIUM tin oxide , *SONICATION - Abstract
Silver nanowires (Ag NWs) are currently the most likely to replace indium tin oxide (ITO) as flexible transparent conducting electrodes (FTCEs), but conventional preparation methods such as solution deposition will lead to weak conductivity and low adhesion to the substrate. In this work, polymethyl methacrylate (PMMA) as a superior mediate for the pressure embedding of Ag NW networks as transparent electrodes with 120 °C is demonstrated. The sheet resistance of the PMMA/Ag NWs FTCEs decreases from 32 Ω/sq. to 8.1 Ω/sq. at an optical transmittance of ~77.5 %. The calculated value of figures of merit (FoM)is as high as 9.77 × 10−3 Ω−1. At the same time, after 10 min of ultrasonication and 30 times of wiping cycle, the sheet resistance is almost unchanged, indicating that the Ag NW networks have good adhesion to the flexible substrate. Meanwhile, the PMMA/Ag NWs FTCEs exhibit good mechanical flexibility with a bending radius up to 0.75 mm. Finally, the successful implementation of the PMMA/Ag NWs FTCEs into a flexible electrochromic device is demonstrated, verifying the applicability of PMMA/Ag NWs FTCEs. • High-reliable PMMA/AgNW FTCEs are obtained by hot lamination process. • PMMA/AgNW FTCEs show simultaneously improved conductivity and adhesion. • Resistance does not show significant change after ultrasonication and wiping test. • Flexible electrochromic device based on FTCEs is prepared and demonstrated. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
19. Improved thermal/chemical stability of flexible Ag NWs/Chitosan composite electrode integrated by chemical welding and sequential protection for better PV performance.
- Author
-
Liu J, Guo L, Liu Z, Shen Q, Gao X, Zhang Z, Liu X, Cheng K, and Du Z
- Abstract
An integration strategy of chemical welding and subsequent protection was demonstrated to address silver nanowires (Ag NWs)-based issues. Preferentially, a halogenated salt of NaCl solution was used to stimulate the junction welding thus to reduce the junction resistance, by virtue of the autocatalytic redox of Ag atoms with halogen ions and dissolved oxygen molecules. Subsequently, chitosan, possessing the biocompatible, degradable, environmentally friendly non-toxic features, was embedded to protect Ag NWs. With these two steps, the composite electrode consisting Ag NWs and chitosan reaches a lowest sheet resistance of ∼8 Ω, with a transmittance over 80% at 550 nm, along with high thermal and chemical stabilities, accompanying with excellent flexibility. Besides, it also prompts a synergistic improvement when pioneered in Cu(In, Ga)Se
2 (CIGS) device as a transparent conductive electrode. It yields a power conversion efficiency of 6.6%, with 32% improvement relative to that bare Ag NWs, and 85% of the conventional one. Our findings present a new strategy for addressing instable/inefficient Ag NWs-based devices, driving their rapid development and its practical applications., (© 2021 IOP Publishing Ltd.)- Published
- 2021
- Full Text
- View/download PDF
20. Solution-processed PEDOT:PSS:GO/Ag NWs composite electrode for flexible organic light-emitting diodes.
- Author
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Du, Hui, Guo, Yangyang, Cui, Dongyue, Li, Shuhong, Wang, Wenjun, Liu, Yunlong, Yao, Yicun, Zhao, Ling, and Dong, Xiaochen
- Subjects
- *
ORGANIC light emitting diodes , *LIGHT emitting diodes , *OPTICAL losses , *ELECTRODES , *INDIUM tin oxide , *PLASMA resonance - Abstract
• The PEDOT:PSS:GO/Ag NWs flexible electrodes were prepared by two-steps solution method with the transmittance and sheet resistance of 88.7% and 17 Ω/sq, respectively. • The performance of OLEDs based on PEDOT:PSS:GO/Ag NWs was superior to that based on ITO. • The enhanced performance of flexible OLEDs mainly attributed to the great performance parameters of the composite electrode, the Far SPR effect and lower waveguide optical loss because of the introduction of Ag NWs in the electrode. Flexible organic light emitting diodes (OLEDs) have attracted considerable attention for the reason of light weight, high mechanical flexibility in display and lighting. The most widely used transparent anode indium tin oxide (ITO) is unsuitable for flexible OLEDs because of its easy cracking upon bending. In this paper, we proposed a simple two steps solution processing method to fabricate flexible PEDOT:PSS:GO/Ag NWs composite electrodes. The optimized PEDOT:PSS:GO/Ag NWs composite electrode exhibits an optical transmittance of 88.7% at a wavelength of 550 nm and a low sheet resistance of 17 Ω/sq, which are comparable to that of ITO. With PEDOT:PSS:GO/Ag NWs composite electrodes, the turn on voltage, current density and maximum brightness of OLEDs based on composite electrode were 2.1 V, 6.2 cd/A and 22894 cd/m2, respectively, which were superior to that OLED based on ITO anode. The enhanced performance of OLEDs based on composite anode mainly attributed to the lower sheet resistance, smoother surface of the composite anode and the far surface plasma resonance (Far SPR) effect, a lower waveguide optical loss because of the introduction of Ag NWs in the electrode. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
21. Synthesis of PbS quantum dots/ZnO nanorods/Ag nanowires composite photocatalysts with enhanced photocatalytic activity.
- Author
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Wei, Junwei, Wei, Shuoming, Chang, Na, Wang, Haitao, Zhang, Jimei, and Shao, Wei
- Subjects
- *
SILVER phosphates , *QUANTUM dot synthesis , *NANOWIRES , *NANORODS , *ELECTRON paramagnetic resonance , *METHYLENE blue - Abstract
• Ag nanowires were selected to capture photogenerated electrons. • ZnO nanorods were planted on Ag nanowires. • PbS quantum dots as the shell of the catalytic system. • The composite exhibits high catalytic performance in the degradation of MB. In this work, PbS quantum dots/ZnO nanorods/silver nanowires (PbS QDs/ZnO NRs/Ag NWs) composite photocatalysts were successfully synthesized. The amount of PbS QDs was controlled by the number of successive ionic layer adsorption and reaction (SILAR) cycles. The cycle was repeated 5, 9 and 13 times, respectively. Degradation of methylene blue under simulated sunlight conditions to evaluate the photocatalytic activity of materials. As expected, the PbS QDs/ZnO NRs/Ag NWs composite performs enhanced photocatalytic activity compared to ZnO NRs and ZnO NRs/Ag NWs. In addition, the experimental results show SILAR cycles have a significant effect on the loading of PbS QDs on ZnO NRs and photocatalytic activity of the composite, among different composites, the composite with 9 SILAR cycles shows the best photocatalytic performance in the degradation of methylene blue (MB). MB can be almost completely degraded in 30 min. The radical-trapping experiments and electron spin resonance demonstrate that superoxide anion radicals and photogenerated holes are main reactive species for photocatalytic degradation. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
22. Facile Synthesis of Silver Nanowires with Different Aspect Ratios and Used as High-Performance Flexible Transparent Electrodes
- Author
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Rui Peng, Qingyong Tian, Qiang Lu, Li Liu, Qingwen Xue, Wei Wu, Jun Liu, Mengxiao Li, and Weijing Yao
- Subjects
Spin coating ,Materials science ,Nano Express ,Ag NWs ,Nanochemistry ,Sintering ,Nanotechnology ,Low-temperature welding ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Flexible transparent electrodes ,Flexible electronics ,0104 chemical sciences ,Indium tin oxide ,Tailorable aspect ratios ,Electrode ,Transmittance ,lcsh:TA401-492 ,General Materials Science ,lcsh:Materials of engineering and construction. Mechanics of materials ,0210 nano-technology ,Sheet resistance - Abstract
Silver nanowires (Ag NWs) are the promising materials to fabricate flexible transparent electrodes, aiming to replace indium tin oxide (ITO) in the next generation of flexible electronics. Herein, a feasible polyvinylpyrrolidone (PVP)-mediated polyol synthesis of Ag NWs with different aspect ratios is demonstrated and high-quality Ag NWs transparent electrodes (NTEs) are fabricated without high-temperature thermal sintering. When employing the mixture of PVP with different average molecular weight as the capping agent, the diameters of Ag NWs can be tailored and Ag NWs with different aspect ratios varying from ca. 30 to ca. 1000 are obtained. Using these as-synthesized Ag NWs, the uniform Ag NWs films are fabricated by repeated spin coating. When the aspect ratios exceed 500, the optoelectronic performance of Ag NWs films improve remarkably and match up to those of ITO films. Moreover, an optimal Ag NTEs with low sheet resistance of 11.4 Ω/sq and a high parallel transmittance of 91.6% at 550 nm are achieved when the aspect ratios reach almost 1000. In addition, the sheet resistance of Ag NWs films does not show great variation after 400 cycles of bending test, suggesting an excellent flexibility. The proposed approach to fabricate highly flexible and high-performance Ag NTEs would be useful to the development of flexible devices. Electronic supplementary material The online version of this article (doi:10.1186/s11671-017-2259-6) contains supplementary material, which is available to authorized users.
- Published
- 2017
23. One‐Step‐Printed, Highly Sensitive, Textile‐Based, Tunable Performance Strain Sensors for Human Motion Detection.
- Author
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Luo, Chengsheng, Tian, Bin, Liu, Qun, Feng, Yu, and Wu, Wei
- Subjects
- *
STRAIN sensors , *MOTION detectors , *STRAIN gages , *HUMAN-computer interaction , *INTELLIGENT sensors , *ROBOT motion , *SILK screen printing - Abstract
Wearable strain sensors have attracted a lot of interests due to their unlimited prospects in applications such as human motion detections, electronic skin, and human–computer interactions. However, the complex manufacturing methods are generally used to fabricate the strain sensors with wide sensing ranges and high sensitivity. Herein, a high‐performance textile‐based strain sensor (TSS) is fabricated by one‐step screen‐printing method via transferring the silver nanowires ink onto a stretchable textile. Through designing the screen plate with various patterns, the optimized TSSs with different sensing ranges and sensitivity can be achieved simultaneously. Among them, a straight line‐structural TSS (with a width of 2 mm) exhibits a wide workable strain range of 120%, high gauge factor of 216, and superior durability (more than 2000 stretching/releasing cycles). As flexible wearable devices, these TSSs are used to monitor human joint motion, prefiguring the various applications in human health detection, soft robots, intelligent devices, etc. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
24. Ag NWs for Organic Photovoltaic Cells: Semitransparent and Stretchable Devices
- Abstract
The current developments on organic photovoltaic (OPV) solar cells are inspired by the idea that they can be processed from solution. One of the challenges in developing fully solution-processed OPV devices is the design of well-performing electrodes with low cost of deposition. This has been one of the focus of the academic and industrial community. Nowadays, the use of ITO as a semitransparent electrode has become a bottleneck. This is because it is brittle, has Indium (a rare element), and needs a high energy intensive deposition process. There are many alternatives presented but none of them match the performance of ITO. Here, we report a full solution-processed ITO-free semitransparent OPV device based on silver nanowires (Ag NWs). To demonstrate the potential of Ag NWs in OPV devices, they were employed as a bottom and top electrode without a post treatment to decrease their roughness. Record devices achieved only a decrease of 6.5% of efficiency in comparison to ITO based reference devices. Furthermore, due to its good bending properties, a working stretchable device was fabricated by depositing the different OPV layers on a pre-stretched elastomeric membrane. These results indicate that Ag NWs can successfully replace ITO as an electrode., Sustainable Energy Technology, Photovoltaic Materials and Devices, Electrical Engineering, Mathematics and Computer Science
- Published
- 2015
25. Ag NWs for Organic Photovoltaic Cells: Semitransparent and Stretchable Devices
- Abstract
The current developments on organic photovoltaic (OPV) solar cells are inspired by the idea that they can be processed from solution. One of the challenges in developing fully solution-processed OPV devices is the design of well-performing electrodes with low cost of deposition. This has been one of the focus of the academic and industrial community. Nowadays, the use of ITO as a semitransparent electrode has become a bottleneck. This is because it is brittle, has Indium (a rare element), and needs a high energy intensive deposition process. There are many alternatives presented but none of them match the performance of ITO. Here, we report a full solution-processed ITO-free semitransparent OPV device based on silver nanowires (Ag NWs). To demonstrate the potential of Ag NWs in OPV devices, they were employed as a bottom and top electrode without a post treatment to decrease their roughness. Record devices achieved only a decrease of 6.5% of efficiency in comparison to ITO based reference devices. Furthermore, due to its good bending properties, a working stretchable device was fabricated by depositing the different OPV layers on a pre-stretched elastomeric membrane. These results indicate that Ag NWs can successfully replace ITO as an electrode., Sustainable Energy Technology, Photovoltaic Materials and Devices, Electrical Engineering, Mathematics and Computer Science
- Published
- 2015
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